Optimal scheduling method in distribution system considering controllable loads

In recent years, distributed generation (DG) and renewable energies source (RES) are attracting special attention to distribution systems. Renewable energies, such as photovoltaic and wind turbine generator systems, are used as green energy. However, the large amount of distributed generation causes voltage deviation beyond the statutory range in distribution systems. Furthermore, power flow at interconnection point is fluctuated substantially. So distribution systems need a solution for voltage control and power flow control method. This paper proposes a decision technique of optimal reference scheduling of the battery energy storage system(BESS), controllable loads(CL), interfaced inverters with DG, and the existing voltage control devices for optimal distribution system operation. In this proposed method, the formulated control objective is solved by optimization algorithm. The proposed method achieves the following a tunes: The node voltage is maintained in the acceptable range, the fluctuations of active and reactive power flows are reduced at the interconnection point in the distribution system. The effectiveness of the proposed method is verified by numerical simulations using MATLAB®.

[1]  Tomonobu Senjyu,et al.  Voltage control in distribution systems considered reactive power output sharing in smart grid , 2010, 2010 International Conference on Electrical Machines and Systems.

[2]  Tomonobu Senjyu,et al.  Optimal Operation Strategy with using BESS and DGs in Distribution System , 2012 .

[3]  Chul-Hwan Kim,et al.  Optimal coordinated voltage control in distribution system , 2008, 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century.

[4]  G.M. Burt,et al.  A Power-Quality Management Algorithm for Low-Voltage Grids With Distributed Resources , 2008, IEEE Transactions on Power Delivery.

[5]  Erkan Atmaca,et al.  An ordinal optimization based method for power distribution system control , 2008 .

[6]  B. Geethalakshmi,et al.  Investigation of performance of UPFC without DC link capacitor , 2008 .

[7]  M.D. Ilic,et al.  An assessment of reactive power/voltage control devices in distribution networks , 2006, 2006 IEEE Power Engineering Society General Meeting.

[8]  D. Karlsson,et al.  Voltage and Reactive Power Control in Systems With Synchronous Machine-Based Distributed Generation , 2008, IEEE Transactions on Power Delivery.

[9]  G.P. Harrison,et al.  Centralized and Distributed Voltage Control: Impact on Distributed Generation Penetration , 2007, IEEE Transactions on Power Systems.

[10]  Ghadir Radman,et al.  Dynamic model for power systems with multiple FACTS controllers , 2008 .